Repair
Siemens SIMODRIVE / S120
SIMODRIVE 611D · 611U · SINAMICS S120 booksize · S120 chassis · MASTERDRIVES MC
Specialist service of Siemens servo drives — repair of SIMODRIVE 611D/U modules (single and dual-axis), S120 Motor Module Booksize/Chassis, S120 Active Line Module (ALM), Capacitor Module and Braking Module. DRIVE-CLiQ and encoder card service. No-obligation quote, 12-month warranty.
Diagnostics included in repair
Priority quote
12-month warranty
Courier pickup from all of Europe
DRIVE-CLiQ and encoder card service
Service: SIMODRIVE 611D/U and S120 Motor Module
SIMODRIVE 611D (CNC)
Repair of single and dual-axis SIMODRIVE 611D modules. Service of NCU control cards (SINUMERIK 840D interface), replacement of IGBT and DC-link capacitors.
SIMODRIVE 611U (universal)
Repair of SIMODRIVE 611U modules. Service of control cards with encoder interface (Hiperface/EnDat), PROFIBUS ports, replacement of IGBT and internal power supply.
SINAMICS S120 booksize
Repair of single-axis (1SMM) and dual-axis (2SMM) S120 Motor Modules. Replacement of IGBT, capacitors, service of DRIVE-CLiQ connectors and X500/X501 coupling cards.
S120 Active Line Module (ALM)
Repair of Active Line Module (ALM) (regenerative). Service of active rectifier section, DC capacitors and CU320 control cards.
S120 chassis (szafowe)
Repair of large S120 chassis modules. Service of IGBT section, cabinet capacitors, liquid and air cooling circuits.
MASTERDRIVES MC (EOL)
Repair of discontinued SIMOVERT MASTERDRIVES Motion Control. Regeneration of amplifier cards and CBx interfaces. Replacement of IGBT and capacitors.
Why EFIXLAB?
- SIMODRIVE 611D + SINUMERIK 840D — we understand the integration between drive and CNC controller. Both layers serviced in one place.
- MASTERDRIVES MC (EOL) — discontinued, but we repair. We have CBP, CBx cards and other components for this older platform.
- DRIVE-CLiQ diagnostics — after repair the module is tested under CU320 control with verification of DRIVE-CLiQ communication and encoder signals.
- S120 chassis up to 500kW — we repair all sizes, from Booksize to large Chassis.
- Priority for machines in operation — we react quickly to stopped production.
- 12-month warranty — on all performed work.
How does servo drive repair work at Siemens?
Request
online or by phone
Shipping
by courier
diagnostics
+ identyfikacja
Quote
no obligation
repair
+ DRIVE-CLiQ test
Return
with warranty
Report fault SIMODRIVE / S120 — no-obligation quote
Provide the Siemens servo drive model and alarm description (F/A code). Our specialist will get back to you with a diagnosis.
Dziękujemy! We have received your request — our Siemens servo specialist will contact you shortly.Frequently asked questions
Yes — we repair SIMODRIVE 611D in both 840D sl and older 840C system configurations. We have cards and know-how for both platforms.
SV0401 is a current controller alarm. The typical cause is a damaged IGBT or regulator card. Diagnostics will pinpoint the exact fault location.
Diagnostics: 1–2 business days. Repair: 5–7 business days after approval and receiving necessary components. Express mode for stopped machines. As a rule — repair time may be significantly extended depending on component availability and repair complexity. Deadlines are agreed individually with the client.
Siemens Servo Drive Repair — SINAMICS S120, SIMODRIVE 611, and MASTERDRIVES
Siemens servo drives — SINAMICS S120 (booksize and blocksize), SIMODRIVE 611U, and legacy MASTERDRIVES MC — are the dominant servo platform in European machine tool, packaging, and printing industries. SINAMICS S120 provides multi-axis servo control with integrated safety, while legacy SIMODRIVE 611 and MASTERDRIVES continue operating in thousands of machines worldwide. The broad Siemens servo installed base ensures continued repair demand across multiple drive generations.
Common Siemens servo drive failures include SINAMICS S120 motor module power stage IGBT failures, Active Line Module (ALM) input rectifier and capacitor issues, SIMODRIVE 611U power module IGBT degradation and current sensor drift, MASTERDRIVES power section failures, and control unit issues across all platforms (CU320, 611U regulation board, MASTERDRIVES control card). Component aging, particularly in DC link capacitors and cooling fans, affects all generations.
At EFIXLAB, we repair all Siemens servo drive generations. Our service covers S120 motor module and Active Line Module power stage rebuild, SIMODRIVE 611U power module and regulation board repair, MASTERDRIVES power stage and control card restoration, and CU320 control unit diagnostics. We test repaired drives with SINAMICS/SIMODRIVE-compatible diagnostic tools and verify servo loop performance, safety functions, and drive communication.
Siemens servo drive repair delivers 40–65% savings versus new drive modules. For SIMODRIVE 611 units that Siemens has discontinued, repair is essential to avoid costly S120 retrofits that require new control unit hardware, re-parameterization, and potentially new motor cables. All Siemens servo drive repairs include comprehensive testing and our 12-month warranty.